Abstract: A computer-implemented method of testing a target system using a stimulus-response test. The method includes obtaining the responses of the target system at predefined monitoring times. Each time the response changes state, a clock is reset, and the elapsed duration is kept from the latest response state change. If the elapsed duration from the last response state change exceeds an expected duration before the next state change, a possible fault is deemed to exist.

Abstract: Systems, methods, and device are provided for process management. One method embodiment includes, in a system process, starting an orphan collector thread (OCT) which is dedicated to cleaning up orphaned children processes adopted by the system process. The orphaned children processes are flagged when adopted by the system process. The OCT will execute a function call to clean up only processes which are flagged as having been adopted by the system process and which have terminated.

Abstract: One embodiment disclosed relates to a method of deactivating a process by a computer operating system. Threads of the process that are currently suspendable are moved to a stopped state. A process-wide deactivation operation is initiated. The process-wide deactivation operation is called by outstanding threads of the process when the outstanding threads re-enter the operating system's kernel.